restructure repo, separate sample app from docker configs

05-example-web-application/README.md

@@ -0,0 +1,16 @@
+Docker Desktop: https://docs.docker.com/get-docker/
+
+Docker Engine: https://get.docker.com/ 
+
+Hello World:
+```
+docker run docker/whalesay cowsay "Hey Team! 👋"
+```
+
+Run Postgres:
+```
+docker run \
+  --env POSTGRES_PASSWORD=foobarbaz \
+  --publish 5432:5432 \
+  postgres:15.1-alpine
+```